Hercynite and Riebeckite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
4.39
  
3.28-3.44
  
Fracture
ConchoidalGemdat.org, Uneven
  
Uneven, Splintery, Brittle
  
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
  
Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}
  
Mohs Hardness
7.5-8
  
5.0-6.0
  
Chemical Composition
Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
  
Not Available
  
Hercynite and Riebeckite Chemical Formula
While comparing Hercynite and Riebeckite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Hercynite and Riebeckite chemical formula.
- Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
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Hercynite and Riebeckite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Hercynite and Riebeckite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Riebeckite Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 3.28-3.44 whereas that of Riebeckite is 3.28-3.44.